Adsorption behavior of hydrotalcite-like modified bentonite for Pb 2+ , Cu 2+ and methyl orange removal from water

Chen, Yu; Peng, Jingdong; Xiao, Huan; Peng, Huanjun; Bu, Lingli; Pan, Ziyu; He, Yan; Chen, Fang; Wang, Xiang; Li, Shiyu

doi:10.1016/j.apsusc.2017.05.138

Cited by 54 publications

(21 citation statements)

References 38 publications

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“…Water pollution, which affects human health and the healthy development of the whole ecosystem, is becoming more and more serious with the rapid development of industries. 1 To date, many types of treatments for water pollution have been developed by researchers, 2,3 but the main drawbacks such as severe reaction conditions or complicated processes signicantly limit their practical applications. In contrast, since previous research has reported that TiO 2 can be used for water splitting and organic pollutant degradation, 4,5 the use of semiconductors as photocatalysts has attracted increasing attention due to their perfect utilization of the clean and renewable solar energy.…”

Section: Introductionmentioning

confidence: 99%

Co₃O₄–Ag photocatalysts for the efficient degradation of methyl orange

Chen

Cui

et al. 2020

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Co₃O₄–Ag photocatalysts for the efficient degradation of methyl orange

Chen

Cui

et al. 2020

RSC Adv.

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“…A variety of research studies have been recently carried out in order to remove/degrade MO from wastewaters [10][11][12][13][14]. Many technologies, such as chemical oxidation [15], photochemical/ ultrasonic degradation [16,17], reverse osmosis [18] and flotation [19] have been exploited.…”

Section: Introductionmentioning

confidence: 99%

A detailed investigation of MnO2 nanorods to be grown onto activated carbon. High efficiency towards aqueous methyl orange adsorption/degradation

Pargoletti

Pifferi

Falciola

et al. 2019

Applied Surface Science

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Herein, we report a one-pot wet chemical method adopted to synthesize ad hoc MnO 2 nanoparticles. By varying both the manganese salt precursors (e.g. sulphate or chloride) and the oxidizing agents (e.g. ammonium persulphate, potassium permanganate or potassium bromate), we succeeded in tailoring MnO 2 structural, morphological and surface features. Hence, owing to nanopowders peculiar properties, they were exploited as adsorbents for aqueous Methyl Orange (MO) removal. Particularly, novel MnO 2 nanorods (from manganese sulphate and potassium bromate, namely MS_Br) showed the highest removal efficiency probably due to both its polymorphic composition and its highest percentage of pores with diameter under 20 nm. Then, this powder was grown on Activated Carbon (AC40, sample MS_Br@AC40) pellets to either enhance its adsorption properties or to facilitate the adsorbent removal at the end of the kinetic test. Novel MS_Br@AC40 shows superior MO removal capabilities, achieving the almost total pollutant disappearance, thanks to the synergistic adsorption/oxidation features between carbon (high surface area, i.e. 1200 m 2 g À1) and MnO 2. By means of HPLC-MS on eluates, we also managed to investigate MS_Br and MS_Br@AC40 degradative power towards MO molecules, thus leading to a novel degradation pathway. Finally, the adsorbent regeneration capability has been evaluated, showing very promising results.

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“…In general, the pH of the aqueous solution is one of the most important parameters that strongly affect the adsorption process of metal ions . The isothermal adsorption experiments of PSF ‐g ‐PSSS membrane for three metal ions were carried out at different pH values, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…In general, the pH of the aqueous solution is one of the most important parameters that strongly affect the adsorption process of SCHEME 1 Chemical processes to prepare functional membrane PSF-g-PSSS [Colour figure can be viewed at wileyonlinelibrary.com] metal ions. 38,39 The isothermal adsorption experiments of PSF-g-PSSS membrane for three metal ions were carried out at different pH values, respectively. Figure 5 gives the adsorption isotherms of Pb 2+ at different pH values.…”

Section: Effect Of Ph On Adsorption Property Of Psf-g-psss Membranementioning

confidence: 99%

Preparation of PSSS‐grafted polysulfone microfiltration membrane and its rejection and removal properties towards heavy metal ions

Gao

Zhang

2019

Polymers for Advanced Techs

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3‐Hydroxy‐N,N‐diethylaniline (HDEA) as a tertiary aromatic amine was introduced onto the surface of chloromethylated polysulfone (CMPSF) microfiltration membrane through modification reaction, resulting in the modified membrane PSF‐DEA. A redox surface‐initiating system (DEA/APS) was constituted by the bonded tertiary aromatic amine group DEA and ammonium persulfate (APS) in aqueous solution, and so, the free radicals formed on the membrane initiated sodium p‐styrenesulfonate (SSS) as an anionic monomer to produce graft polymerization, getting the grafting‐type composite microfiltration membrane, PSF‐g‐PSSS membrane. Subsequently, the adsorption property of PSF‐g‐PSSS membrane for three heavy metal ions, Pb2+, Zn2+, and Hg2+ ions, was fully examined, and the rejection performance of PSF‐g‐PSSS membrane towards the three heavy metal ions was emphatically evaluated via permeation experiments. The experimental results show that by the initiating of the surface‐initiating system of DEA/APS, the graft polymerization can smoothly be carried out under mild conditions. PSF‐g‐PSSS membrane as a functional microfiltration membrane has strong adsorption ability for heavy metal ions by right of strong electrostatic interaction (or ion exchange action) between the anionic sulfonate ions on the membrane and heavy metal ions. The order of adsorption capacity is Pb2+ > Zn2+ > Hg2+, and the adsorption capacity of Pb2+ ion gets up to 2.18 μmol/cm2. As the volume of permeation solutions, in which the concentrations of the three metal ions are 0.2 mmol/L, are in a range of 50 to 70 mL, the rejection rate of PSF‐g‐PSSS membrane for the three heavy metal ions can reach a level of 95%, displaying a fine rejection and removing performance towards heavy metal ions.

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Adsorption behavior of hydrotalcite-like modified bentonite for Pb 2+ , Cu 2+ and methyl orange removal from water

Cited by 54 publications

References 38 publications

Co₃O₄–Ag photocatalysts for the efficient degradation of methyl orange

Co₃O₄–Ag photocatalysts for the efficient degradation of methyl orange

A detailed investigation of MnO2 nanorods to be grown onto activated carbon. High efficiency towards aqueous methyl orange adsorption/degradation

Preparation of PSSS‐grafted polysulfone microfiltration membrane and its rejection and removal properties towards heavy metal ions

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Adsorption behavior of hydrotalcite-like modified bentonite for Pb 2+ , Cu 2+ and methyl orange removal from water

Cited by 54 publications

References 38 publications

Co3O4–Ag photocatalysts for the efficient degradation of methyl orange

Co3O4–Ag photocatalysts for the efficient degradation of methyl orange

A detailed investigation of MnO2 nanorods to be grown onto activated carbon. High efficiency towards aqueous methyl orange adsorption/degradation

Preparation of PSSS‐grafted polysulfone microfiltration membrane and its rejection and removal properties towards heavy metal ions

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Product

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Co₃O₄–Ag photocatalysts for the efficient degradation of methyl orange

Co₃O₄–Ag photocatalysts for the efficient degradation of methyl orange